Answer
Prokaryotes include two domains of life: the archaea and the bacteria. The differences indicate they are both extremely ancient lines. The evolutionary time necessary for this divergence means it must have happened well before eukaryotes appeared.
Work Step by Step
Prokaryotes include two domains of life: the archaea and the bacteria. The differences indicate they are both extremely ancient lines. The evolutionary time necessary for this divergence means it must have happened well before eukaryotes appeared.